Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
측량술은 땅의 경계를 측정하는 기술입니다.Cheuglyang-sul-eun ttang-ui gyeong-gye-reul cheugjeonghaneun gisul-imnida.Surveying is the technique used to measure land boundaries.